The axis part is a rotating part, which is greater than the diameter. It consists of (yóu) outer cylindrical, cone surface, inner holes, threads, and corresponding end faces. There are bonds, bonds, horizontal holes, grooves, etc. The axis is an important part of mechanical composition, and it is also one of the common typical parts in mechanical processing. It supports other rotor (jiàn) to turn and conveys the torque, and at the same time connects to the rack of the machine through the bearing. The shaft parts can be used according to the requirements, production types, equipment conditions and structures. For a shaft with a small diameter of the outer circle, it is generally based on stick materials, and for a ladder shaft or an important axis with a large diameter of the outer circle, forging items, so as to save materials and reduce the workload of mechanical processing (liàng) Essence .Forging parts with large circular diameter or important shafts, forging parts are often selected. In this way, it can save materials and reduce the workload of mechanical processing, but also improve mechanical properties. 45 steel is a common material for shaft parts. It is cheaper to get (dào) to get (dào) better cutting after the price is adjusted (or positive fire). Performance and comprehensive mechanical properties such as high strength and toughness can be obtained. The surface hardness can reach 45 ~ 52HRC after quenching. The long diameter ratio of the shaft is less than 5 (wèi) short shaft, which is greater than 20 as a slender shaft. Most of the axis agglomerate between the two. Generally, the rough surface roughness of the shaft diameter that is matched with the transmission parts is RA2. 5 ~ 0.63 μm, the roughness of the surface (miàn) of the bearing diameter that is matched with the bearing is RA0.63 ~ 0.16 μm, (4) the surface roughness, according to the different production scale. There are two types of rough forging methods: free forging and mold forging. Most of the small and medium -sized production uses free forging, and a large number of production of mold forging is used in large quantities. Requires, axis parts are one of the typical parts often encountered in machines. It is mainly used to support the passing parts. Passing torque and tolerance load. The axis parts are rotating parts. The length is greater than the diameter. It is generally composed of the outer cylindrical surface, cone surface, inner hole and thread of the cone, and the corresponding end surface. Parts can be divided into light shafts (zhòu), stair shafts, hollow shafts, and crankshafts. First, rough and materials of shaft parts, shaft parts should be selected according to different working conditions and use requirements. Specifications (such as quality adjustment, positive fire, quenching, etc.) to obtain a certain strength, toughness and abrasion resistance, (1) size accuracy. (3) The accuracy of the mutual position, the location of the axis parts (jīng) is mainly determined by the position and function of the shaft in the mechanical. Generally, the neck of the assembly of the motion parts of the supporting part of the supporting part of the support of the support of the support of the support is the same axis requirements. Otherwise, it will affect the transmission accuracy of the transmission parts (gear, etc.), and generate noise. The axis of the axis section is generally 0.01 ~ 0.03mm with the axis section. Such as the main axis) is usually 0.001 ~ 0.005mm, bearing steel GCR15 and spring steel 65mn. After the quality and the surface high frequency quenching, the surface hardness can reach 50 ~ 58HRC, and it has high fatigue resistance and good wear resistance. It can create a high -precision shaft (zhòu). The axis segment with the bearing is called the neck, and the neck is the assembly (Pèi) benchmark of the shaft. Their accuracy and surface quality requirements are generally high, and their technical requirements (yī) are formulated according to the main functions and working conditions of the axis. Generally, there are the following items: the geometric shape accuracy of the axis parts mainly refers to the neck and outside. The roundness, cylindricality, etc. of the cone surface, Mo's cone holes, etc., generally limited their tolerance to the size of the tolerance (wéi), and the surface of the internal and external circles (yuán) with higher accuracy should be marked on the drawing on the drawings. Allow deviation. (1) Rough, 40CR and other alloy structure steel for shaft parts are suitable for axis parts with medium accuracy and higher speed. This type of steel has a better comprehensive comprehensive (Hé) mechanical properties after quality and quenching. (2) Geometric shape accuracy. In order to determine the position of the axis, the noses that are supported are usually required for its size (jīng) degree (qiú) high (IT5 ~ IT7). Requirement (jiào) lower (IT6 ~ IT9), the main axis of the precision machine tool (such as the grinding machine sand wheel axis and the coordinates of the coordinates) can be selected. After the quality and surface nitride of this steel can not only obtain (huò) high surface hardness, but also maintain a softer core part. Change (biàn) has a small characteristics and higher hardness. Ultra -high -speed processing skills include: What are the processing techniques of super (chā precision component processing? O) high -speed cutting and grinding mechanism discussion, ultra -high -speed spindle unit manufacturing skills, ultra -high -speed feed unit manufacturing skills, ultra -high -speed processing tools and grinding grinders With manufacturing skills, ultra -high -speed processing online active detection and restraint skills, etc., ultra -fine processing skills are the primary inclusive: super fine processing mechanism discussions, super fine processing (DE) equipment manufacturing skills discussion, super fine processing things and blade grinding skills discussion discussions Essence Super fine measurement skills and error compensation skills discussions, premise discussions of ultra -fine processing tasks, ultra -high -speed processing skills refers to the use of ultra -hard data tools to improve the cutting rate of the cutting speed and feed speed of the large plastic CNC processing ground to improve the resection rate of the data. , Modern processing skills with processing accuracy and processing quality. Ultra -high -speed processing technology is part of the weight of precision component processing technology (yào), because precision processing has high requirements for accuracy, and only small errors can be allowed. Therefore, we must focus on the processing of machine tools and super hard materials to solve these (xiē) problems, and improve the high -precision processing capabilities of the machine tool. To solve the material cutting speed, super fine processing at that time refers to the size and accuracy of the processing parts higher than (yú) 0.1 μm, the thick appearance RA is less than 025 μm, and the positioning rate and anti -(fǎn) complexity of the positioning accuracy of the machine tools used. Machining skills higher than 0.01 μm, also known as the sub -micron -level processing skills, and are carried out to Na (Nà) rice -level processing skills. ) Different cutting methods vary. At present, the speed limit of the high -speed cutting of various data is: aluminum alloy has exceeded 1600m/min. The cast iron is 1500m/min, the ultra -heat -resistant nickel alloy is 300m/min, the titanium alloy is 150 ~ 1000m/min, and the fiber enhanced plastic is 2000 ~ 9000m/min. Min, milling 300 ~ 6000m/min, drilling 200 ~ 1100m/min, grinding 250m/s or more, etc. In an article on a shàng), we introduced the form of mechanical processing in a article. The chief engineer of the technology introduces the processing technology of precision components:.